code: def test_command_handler(self):
      transport = mock.Mock()
      transport.write = MagicMock(return_value="response_message")
      request_message = "SELECT id FROM foo;"
  
      asyncio.run(handle_request(None, transport, request_message))
  
file_path: evadb/test/unit_tests/server/test_command_handler.py
imports: import asyncio
  import unittest
  from unittest.mock import MagicMock
  import mock
  from evadb.server.command_handler import handle_request
label_desc: Use image node_id 3 for calling the CommandHandlerTests obj's underlying member method code with example usage: obj.test_command_handler() without return types